Nissan Pathfinder (2011 year). Manual - part 381

CAMSHAFT VALVE CLEARANCE

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6. Measure valve clearances at the locations marked “

×

” as shown

in the table below (locations indicated with black arrow).
•

: Engine front

•

 (black): Measurable at No.1 cylinder compression top dead

center

•

 (white): Measurable at No. 3 cylinder compression top

dead center

• A:  RH

• B:  LH 

• C: Exhaust

• D: Intake

NOTE:

Firing order 1-8-7-3-6-5-4-2

• No. 1 cylinder compression TDC

• Measure valve clearance using suitable tool. Refer to 

EM-255,

"Standard and Limit"

.

CAUTION:

If the inspection was carried out with a cold engine, make

sure the values with a fully warmed up engine are still

within specifications.

7. Turn the crankshaft pulley clockwise 270

°

 from the position of No. 1 cylinder compression TDC to obtain

No. 3 cylinder compression TDC.

Measuring position (RH bank)

No. 2 cyl 

(E)

No. 4 cyl 

(F)

No. 6 cyl 

(G)

No. 8 cyl 

(H)

No. 1 cylinder at TDC

 EXH

×

INT

×

×

Measuring position (LH bank)

No. 1 cyl 

(J)

No. 3 cyl 

(K)

No. 5 cyl 

(L)

No. 7 cyl 

(M)

No. 1 cylinder at TDC

INT

×

×

EXH

×

×

WBIA0713E

KBIA0185E

2011 Pathfinder

EM-160

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CAMSHAFT VALVE CLEARANCE

8. Measure valve clearances at the locations marked “

×

” as shown

in the table below (locations indicated with white arrow).
•

: Engine front

•

 (black): Measurable at No.1 cylinder compression top dead

center

•

 (white): Measurable at No. 3 cylinder compression top

dead center

• A:  RH

• B:  LH 

• C: Exhaust

• D:  Intake

NOTE:

Firing order 1-8-7-3-6-5-4-2

• No. 3 cylinder compression TDC

• Measure valve clearance using suitable tool. Refer to 

EM-255,

"Standard and Limit"

.

CAUTION:

If the inspection was carried out with a cold engine, make

sure the values with a fully warmed up engine are still

within specifications.

Measuring position (RH bank)

No. 2 cyl 

(E)

No. 4 cyl 

(F)

No. 6 cyl 

(G)

No. 8 cyl 

(H)

No. 3 cylinder at TDC

 EXH

×

INT

×

Measuring position (LH bank)

No. 1 cyl 

(J)

No. 3 cyl 

(K)

No. 5 cyl 

(L)

No. 7 cyl 

(M)

No. 3 cylinder at TDC

INT

×

×

EXH

×

×

WBIA0713E

KBIA0185E

2011 Pathfinder

CAMSHAFT VALVE CLEARANCE

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9. Turn the crankshaft pulley clockwise 90

°

 from the position of No.

3 cylinder compression TDC (clockwise by 360

°

 from the posi-

tion of No. 1 cylinder compression TDC) to measure the intake

and exhaust valve clearances of No. 6 cylinder (G) and the

exhaust valve clearance of No. 2 cylinder (E).
•

: Front

• A:  RH

• B:  LH

• C: Exhaust

• D: Intake

• E: No. 2 cylinder

• F: No. 4 cylinder

• G: No. 6 cylinder

• H: No. 8 cylinder

• J: No. 1 cylinder

• K: No. 3 cylinder

• L: No. 5 cylinder

• M: No. 7 cylinder

10. If out of specifications, adjust as necessary. 

ADJUSTMENT

NOTE:

• Perform adjustment depending on the selected head thickness of the valve lifter.

• The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differences

caused by temperature. Use the specifications for hot engine condition to adjust.

1. Remove the camshaft. Refer to 

EM-200, "Removal and Installation"

.

2. Remove the valve lifters at the locations that are out of specification.
3. Measure the center thickness of the removed valve lifters using

suitable tool.

4. Use the equation below to calculate the valve lifter thickness for

replacement.

• Valve lifter thickness calculation:

Thickness of replacement valve lifter = t1+ (C1 - C2)

t1 = Thickness of removed valve lifter

C1 = Measured valve clearance

C2= Standard valve clearance:

• Thickness of a new valve lifter can be identified by stamp

marks on the reverse side (inside the cylinder).

Stamp mark N788 indicates 7.88 mm (0.3102 in) in thickness.

• Available thickness of valve lifter: 25 sizes with range 7.88 to

8.36 mm (0.3102 to 0.3291 in) in steps of 0.02 mm (0.0008 in)

(when manufactured at factory). Refer to 

EM-255, "Standard

and Limit"

.

5. Install the selected valve lifter.

WBIA0713E

KBIA0057E

KBIA0119E

2011 Pathfinder

EM-162

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CAMSHAFT VALVE CLEARANCE

6. Install the camshaft.
7. Manually turn the crankshaft pulley a few turns.
8. Make sure the valve clearances for a cold engine are within specifications. Refer to 

EM-255, "Standard

and Limit"

.

9. After completing the repair, check the valve clearances again with the specifications for a warmed engine.

Make sure the values are within specifications. Refer to 

EM-255, "Standard and Limit"

.

2011 Pathfinder

COMPRESSION PRESSURE

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COMPRESSION PRESSURE

Compression Pressure

INFOID:0000000006247069

CHECKING COMPRESSION PRESSURE

1. Warm up the engine thoroughly. Then stop the engine.
2. Release the fuel pressure. Refer to 

EC-938, "Fuel Pressure Check"

.

CAUTION:

If CONSULT-III is not used to release fuel pressure leave the fuel pump fuse disconnected until

step 7.

3. Remove the spark plug from each cylinder. Refer to 

EM-156, "Removal and Installation"

.

4. Connect the engine tachometer (not required in use of CONSULT-III).
5. Install the compression tester with Tool into the spark plug hole.

6. With the accelerator pedal fully depressed, turn the ignition

switch to “START” for cranking. When the gauge pointer stabi-

lizes, read the compression pressure and engine rpm. Perform

these steps to check each cylinder.

Unit: kPa (kg/cm

2

, psi) /rpm

CAUTION:

Always use a fully charged battery to obtain specified engine speed.

• If the engine speed is out of the specified range, check the battery liquid for proper gravity. Check the

engine speed again with normal battery gravity. 

• If the compression pressure is below the minimum value, check the valve clearances and parts associ-

ated with the combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head,

cylinder head gasket). After checking, measure the compression pressure again.

• If some cylinders have low compression pressure, pour a small amount of engine oil into the spark plug

hole of the cylinder to re-check it for compression.

- If the added engine oil improves the compression, the piston rings may be worn out or damaged. Check

the piston rings and replace if necessary.

- If the compression pressure remains at a low level despite the addition of engine oil, the valves may be

malfunctioning. Check the valves for damage. Replace the valve or valve seat accordingly.

• If two adjacent cylinders have respectively low compression pressure and their compression remains

low even after the addition of engine oil, the cylinder head gaskets may be leaking, or a valve in adja-

cent cylinders may be damaged. Inspect and repair as required.

7. Install the components in the reverse order of removal.
8. Start the engine and confirm that it runs smoothly.
9. Perform trouble diagnosis. If DTC appears, erase it. Refer to 

EC-601, "Description"

.   

Tool number

: EG15050500 (J-45402)

Standard

Minimum

Deference limit      be-

tween cylinders

 1,520 (15.5, 220) / 200

 1,324 (13.5, 192) / 200

      98 (1.0, 14) / 200

WBIA0605E

2011 Pathfinder

EM-164

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ENGINE ROOM COVER

REMOVAL AND INSTALLATION

ENGINE ROOM COVER

Removal and Installation

INFOID:0000000006247070

CAUTION:

Do not damage or scratch cover when installing or removing. 

REMOVAL

• Remove the engine room cover bolts and engine room cover.

INSTALLATION

Installation is in the reverse order of removal.

ALBIA0414GB

2011 Pathfinder

AIR CLEANER AND AIR DUCT

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AIR CLEANER AND AIR DUCT

Exploded View

INFOID:0000000006247071

Removal and Installation

INFOID:0000000006247072

REMOVAL

CAUTION:

Handle mass air flow sensor with care.

• Do not shock it.

• Do not disassemble it.

• Do not touch its sensor.

NOTE:

• Add marks as necessary for easier installation.
1. Remove the engine room cover using power tool. Refer to 

EM-164, "Removal and Installation"

.

2. Disconnect the harness connector from air cleaner case (upper).
3. Disconnect crankcase ventilation hoses at resonator.
4. Remove the air duct and resonator assembly and air cleaner case (upper).
5. Remove air cleaner filter and air cleaner case (lower).

INSPECTION AFTER REMOVAL

Inspect air duct and resonator assembly for crack or tear.

• If anything found, replace air duct and resonator assembly.

INSTALLATION

Installation is in the reverse order of removal.

1.

Air cleaner case (lower)

2.

Air cleaner filter

3.

Air cleaner case (upper)

4.

Air duct and resonator assembly

Front

ALBIA0413GB

2011 Pathfinder

EM-166

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INTAKE MANIFOLD

INTAKE MANIFOLD

Exploded View

INFOID:0000000006247073

Removal and Installation

INFOID:0000000006247074

REMOVAL

1. Partially drain the engine coolant. Refer to 

CO-44, "Changing Engine Coolant"

.

WARNING:

To avoid the danger of being scalded, never drain the engine coolant when the engine is hot.

2. Release the fuel pressure. Refer to 

EC-938, "Fuel Pressure Check"

.

3. Disconnect the battery negative terminal. Refer to 

PG-76, "Removal and Installation"

.

4. Remove the air duct and resonator assembly. Refer to 

EM-165, "Removal and Installation"

.

5. Disconnect the fuel tube quick connector on the engine side in

the following steps.

1.

Intake manifold

2.

PCV hose

3.

Gasket

4.

Electric throttle control actuator

5.

Water hose

6.

Water hose

7.

PCV hose

8.

EVAP hose

9.

EVAP canister purge control solenoid valve

10.

Bracket

11.

Gasket

KBIA2461E

LBIA0395E

2011 Pathfinder